JP2001238831A - Electric vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric vacuum cleaner with a suction head excellent in dust collecting performance. SOLUTION: Of the two shielding plates 6 movable as linked to the movement of the rotor 16 of the motor 8, either one is stored inside and the other is grounded outside. No matter which way the suction head 1 moves, the different positions of these shielding plates 6 not only make it easier to catch the dust in the forward direction but also make it possible to keep high dust collection power because all the dust being hit to the back shield can be caught without being left backward. Also the rotary brush 7 contributes to the high clean-up performance, as the rotation normally opposite to the forward direction can sweep the dust in the depth off a carpet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner used in a general household or the like.

[0002]

2. Description of the Related Art FIGS. 9 to 11 show the structure of a suction tool used in a conventional vacuum cleaner. FIG. 9A shows a forward movement, and FIG. 9B shows a backward movement. In the drawing, reference numeral 1 denotes a suction tool main body, which has a suction port 2 on the bottom surface. 3a, 3b
Is a wheel for moving the suction tool main body 1;
A connection pipe 4 that communicates with the suction port 2 is provided at the rear of the connection pipe. 5 is a floor surface grounded by the wheels 3a and 3b,
A long rubber-shaped shield plate 6 is provided at the rear of the suction port 2 with respect to the traveling direction. Reference numeral 7 denotes a rotating brush for cleaning the carpet, which is connected to a motor 8 by a transmission unit 9. Reference numeral 10 denotes a suction tool attachment pipe that communicates with the connection pipe 4, and is connected to a cleaner body 12 via a hose 11. Reference numeral 13 denotes a dust collection chamber that collects and accumulates dust, and 14 denotes an electric blower that generates a suction force. Here, arrow A represents the flow of dust.

The operation of the above construction will be described. When the electric blower 14 in the cleaner main body 12 generates a suction force, the dust collecting chamber 13, the hose 11, and the suction fitting mounting pipe 1 are moved.
0, suction force is generated in the suction port 2 through the connection pipe 4. Since the air flow from behind is shielded by the shielding plate 6, dust is concentrated from the front of the suction port 2, and dust collection performance higher than when the shielding plate 6 does not exist can be obtained. it can. Further, the rotational force of the motor 8 is
Through the rotating brush 7 to scrape out the garbage that has entered the bristle feet of the carpet.

[0004]

In the above vacuum cleaner,
The shielding plate 6 is fixed to the rear of the suction port 2 irrespective of the traveling direction of the suction tool main body 1. In particular, the shielding plate 6 arranged in front of the suction port 2 in the retreating direction blocks dust when the retreating is performed. 6, dust in the forward direction cannot be sucked in, and the dust collecting ability of the suction tool is reduced.

[0005] It is an object of the present invention to provide a vacuum cleaner which facilitates suction of dust ahead of the shielding plate 6 in the traveling direction, maintains suction power, and enhances dust collection capability.

[0006]

A suction tool provided with a suction port on a lower surface, a rotary brush rotatably arranged in the suction tool, a motor for driving the rotary brush, and front and rear portions of the suction port A suction plate which is provided in the suction port and which moves in the suction direction in cooperation with the rotor of the motor and in which the suction direction of the suction port is housed and whose rear side protrudes, and an electric blower which applies suction force to the suction tool. It has a machine body.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION
A suction tool provided with a suction port on a lower surface, a rotary brush rotatably arranged in the suction tool, a motor for driving the rotary brush, and a rotor of the motor provided at front and rear portions of the suction port A motor provided with a shielding plate in which the suction port moves in the traveling direction side and which is protruded rearward when the suction tool moves, and a cleaner main body which houses an electric blower for applying a suction force to the suction tool. The shield plate is housed and protruded using the rotating force of the rotor, making it easy to suck dust in the front in the traveling direction and maintaining a high suction force at all times. Suction without escaping.

According to a second aspect of the present invention, there is provided a suction tool provided with a suction port on a lower surface, a rotary brush rotatably disposed in the suction tool, a motor for driving the rotary brush, A shield plate provided at the front and rear portions of the suction port and interlocking with the stator of the motor, a shielding plate which is accommodated in the advancing direction side of the suction port and projects rearward when the suction tool is moved, and an electric motor for applying a suction force to the suction tool It is equipped with a vacuum cleaner body that houses the blower, and uses the reaction force of the motor stator to store and protrude the shielding plate, making it easy to suck dust in the front in the traveling direction and always maintaining a high suction force. In addition, dust is caused to collide with the shielding plate and is sucked without escaping backward.

According to the third aspect of the present invention, since the rotating brush and the motor are provided at separate locations and are connected by the power transmission portion, the rotating force of the motor is independent of the installation position of the rotating brush. Has been taken out.

In the invention according to claim 4 of the present invention, since the motor is provided inside the rotary brush, the size of the suction tool is reduced.

In the invention according to claim 5 of the present invention, since the moving direction detecting portion is provided on the lower surface or inside of the suction tool, the rotation of the motor is reversed depending on the moving direction, and the shielding plate interlocked with this is also stored and projected. .

In the invention according to claim 6 of the present invention, since the return prevention locking portion connected to the shielding plate is provided, the shielding portion may return due to recoil or vibration while the suction tool main body moves in one direction. Absent.

[0013] In the invention according to claim 7 of the present invention, since the over-projection preventing locking portion connected to the shielding plate is provided, the shielding plate is excessively protruded when receiving an excessive transmission force from the motor, so that the floor surface is prevented. High-speed collision does not occur.

According to the eighth aspect of the present invention, since the shielding plate is made of an elastic material or a material having low frictional resistance, or both of them, when receiving an excessive transmission force from the motor, the shielding plate protrudes excessively and the floor is protruded. It does not collide with the surface at high speed and generate high frictional force.

According to the ninth aspect of the present invention, since the gear portion is provided between the motor and the shield plate, the shield portion can be housed and projected regardless of the rotation direction, the torque and the number of rotations of the motor. it can.

According to the tenth aspect of the present invention, since the shielding plate is integrated with the suction device, and the entire suction device except the wheels is inclined forward or backward, the shielding plate can be moved up and down with a simple structure. be able to.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

(Embodiment 1) FIG. 1 shows a first embodiment of the present invention.
And FIG. The arrangement of the suction tool main body, the connection pipe, and the cleaner main body and the like communicating therewith is the same as that of the conventional configuration, and a detailed description thereof will be omitted. Since the feature of this embodiment is on the bottom surface of the suction tool main body, it will be described in detail below. FIG. 1 is a side cross-sectional view of the suction tool, and FIG. 2 is a plan cross-sectional view.

In FIGS. 1 and 2, reference numeral 1 denotes a suction tool main body, which has a suction port 2 on the lower surface. Reference numerals 3a and 3b denote wheels for moving the suction tool main body 1, and a connection pipe 4 communicating with the suction port 2 is provided behind the suction tool main body 1. 5
Is a floor surface grounded by the wheels 3a and 3b.
Reference numerals a and 6b denote long rubber shield plates provided before and after the suction port 2. Reference numeral 7 denotes a rotary brush for cleaning the carpet, which is connected to a motor 8 by a rubber transmission belt 9. 16 and 17 are a rotor and a stator of the motor 8,
7 is fixed to the suction tool main body 1. 21 is the stator 16
The clutch 21 has a lever 2
2 are provided, and are interlocked with the shielding plates 6a and 6b via movable arms 23a and 23b whose upper ends are rotatably connected. Reference numeral 24 denotes a projection provided on the lower surface of the suction tool main body for detecting the moving direction, and is in contact with the floor surface 5. 2
Numeral 5 denotes a projection provided on the movable arm 23, above which a small projection 26 for preventing return and a large projection 2 below which prevent excessive projection.
7 are provided. Here, the arrow B indicates the rotation direction of the rotating brush 7.

The operation in the above configuration will be described. When a suction force is generated by the electric blower in the cleaner body, the pressure of the suction port 2 is reduced and suction is performed. When the suction tool main body 1 is further advanced, the micro switch of the detection projection 24 is turned on, and the motor 8 rotates in a direction opposite to the traveling direction. At the same time, the rotating brush 7 is moved by the arrow B through the transmission belt 9.
Rotate in the direction of. Further, the clutch 21 connected to the rotor 16 of the motor 8 rotates, and the movable arms 23a and 23b and the shielding plate 6a
6b is stored and protruded. At this time, the movable arm 23b
Movement of the movable arm projection 25b provided above is suppressed by the large projection 27b, and the small projection 26b does not easily return due to vibration or the like. At the time of retreat, the operation is performed by reading the symbols b and a.

As described above, according to the vacuum cleaner of the present embodiment, the shielding plate 6 is housed and protruded in conjunction with the rotor 16 of the motor 8, so that it is ensured regardless of the moving state of the suction tool main body 1. The stored shielding plate 6 makes it easier to suck dust in the front in the traveling direction, and the protruding and grounded shielding plate 6 can always maintain a high suction force. Further, the dust collides with the shielding plate 6 and escapes backward. Suction performance can be improved by suction. Also, since the rotating brush 8 is normally rotated in the reverse direction with respect to the traveling direction, the cleaning performance is enhanced by scraping out the dust that has entered the bristle feet of the carpet.

When the shielding plate 6 is made of an elastic body or a material having low frictional resistance, the shielding plate 6 is protruded too much and damages the floor surface or generates a high frictional force even when an excessive transmission force is received from the motor. Operability is not reduced.

Further, by providing a gear portion between the motor 8 and the clutch 21 or the lever 22, the shielding portion 6 can be housed reliably and without burden, regardless of the rotation direction, torque and rotation speed of the motor 8. And it can be made to protrude, so that high suction performance can always be obtained, and durability can be further improved.

The suction plate can be realized with a simple structure by integrating the shielding plate 6 and the suction device main body 1 and tilting the entire suction device except the wheels 3 forward or backward.

(Embodiment 2) FIG. 3 shows a second embodiment of the present invention.
And FIG. Since the basic structure of the suction tool is the same as that of the first embodiment, the same components are denoted by the same reference numerals, and detailed description thereof will be omitted. This will be described in detail below.

FIG. 3 is a side sectional view of the suction tool, FIG. 4 is a plan sectional view, and the connecting pipe 4 is not shown in cross section to represent a circular pipe which is not mounted.

3 and 4, a clutch 21 is provided on the stator 17 of the motor 8, and receives a reaction force of the motor 8 to operate the lever 22 in a direction opposite to the rotation direction of the motor 8.

From this, the shielding plate 6 is housed and protruded in conjunction with the stator 17 of the motor 8, so that the suction tool main body 1
Irrespective of the moving state of, the stored shielding plate 6 makes it easy to suck dust in the forward direction in the traveling direction, and the projected and grounded shielding plate 6 can always maintain a high suction force. 6, the suction performance can be improved by sucking without escaping backward. Further, since the rotating brush 7 normally rotates forward with respect to the traveling direction, the suction tool can be moved with a small operation force.

(Embodiment 3) FIG. 5 shows a third embodiment of the present invention.
And FIG. Since the basic structure of the suction tool is the same as that of the first embodiment, the same components are denoted by the same reference numerals, and detailed description thereof will be omitted. This will be described in detail below.

FIG. 5 is a side sectional view of the suction tool, and FIG. 6 is a plan sectional view. The connecting pipe 4 is not shown in cross section to represent a circular pipe which is not mounted.

5 and 6, the motor 8 is provided inside the rotating brush 7, and the rotor 16 directly applies a rotating force to the rotating brush 7. The stator 17 is fixed to the suction tool main body 1.

Here, when the motor 8 rotates, the rotor 16
Rotates the rotating brush 7, and further rotates the clutch 21 together.

From this, the shield plate 6 is housed and protruded in conjunction with the rotor 16 of the motor 8, so that the suction tool main body 1
Irrespective of the moving state of, the stored shielding plate 6 makes it easy to suck dust in the forward direction in the traveling direction, and the projected and grounded shielding plate 6 can always maintain a high suction force. 6, the suction performance can be improved by sucking without escaping backward. Also, since the rotating brush 8 is normally rotated in the reverse direction with respect to the traveling direction, the cleaning performance is enhanced by scraping out the dust that has entered the bristle feet of the carpet. Further, since the motor 8 is provided inside the rotary brush 7, the size of the suction tool is reduced.

(Embodiment 4) FIG. 7 shows a fourth embodiment of the present invention.
And FIG. Since the basic configuration of the suction tool is the same as that of the third embodiment, the same components are denoted by the same reference numerals, detailed description thereof will be omitted, and the vicinity of the shielding plate, which is a characteristic part of this embodiment, will be described. This will be described in detail below.

FIG. 7 is a side sectional view of the suction tool, and FIG. 8 is a plan sectional view. The connecting pipe 4 is not shown in cross section to represent a circular pipe which is not mounted.

7 and 8, the motor 8 is provided inside the rotating brush 7, and the rotor 16 directly applies a rotating force to the rotating brush 7. One end of the stator 17 is instructed to rotate freely by the bearing 31, and the clutch 21 is connected to the stator 17.

When the motor 8 rotates, the shielding plate 6 is stored and protruded in conjunction with the stator 17 of the motor 8. The plate 6 makes it easy to suck dust in the front in the traveling direction, and the projecting and grounding shield plate 6 can always maintain a high suction force. Further, the dust collides with the shield plate 6 and is sucked without escaping backward. The suction performance can be improved. Further, since the rotating brush 7 normally rotates forward with respect to the traveling direction, the suction tool can be moved with a small operation force. Further, since the motor 8 is provided inside the rotary brush 7, the size of the suction tool is reduced.

[0038]

According to the first aspect of the present invention,
The shield plate is stored and protruded in conjunction with the rotor of the motor, so that regardless of the moving state of the suction tool main body, the stored shield plate makes it easier to suck dirt in the traveling direction, and the shield plate protrudes to the ground. Thus, it is possible to always maintain a high suction force, and it is possible to improve the suction performance by colliding dust with the shielding plate and sucking the dust without escaping backward. In addition, since the rotating brush is normally rotated in the reverse direction with respect to the traveling direction, the cleaning performance is enhanced by scraping out dust that has entered the fur of the carpet.

According to the second aspect of the present invention, the shield plate is housed and projected in conjunction with the stator of the motor, so that the housed shield plate is reliably used regardless of the moving state of the suction tool main body. In addition to making it easier to absorb trash on the traveling direction,
A high suction force can be maintained at all times by the protruding and grounded shielding plate, and furthermore, the dust can be made to collide with the shielding plate and be sucked without escaping backward, thereby improving the suction performance. Also, since the rotating brush normally rotates forward with respect to the traveling direction,
The suction tool can be moved with a small operation force.

According to the third aspect of the present invention, since the rotating brush and the motor are provided at separate places,
The rotational force of the motor can be taken out regardless of the installation position of the rotary brush, and the interlocking configuration with the shielding plate can be facilitated. Also, a thin suction tool that can clean a narrow gap can be used.

According to the fourth aspect of the present invention, since the motor is provided inside the rotary brush, the suction tool can be reduced in size and weight, and high operability can be obtained.

According to the fifth aspect of the present invention, since the suction direction is provided with the moving direction detecting section, the rotation of the motor is surely reversed depending on the moving direction, and the shielding plate interlocked with this is also reliably formed. It can be stowed and protruded to always obtain high suction performance.

According to the invention of claim 6 of the present invention, since the return prevention locking portion is provided, the shielding portion does not return due to recoil or vibration while the suction tool main body is moving in one direction. High suction performance can be obtained.

According to the seventh aspect of the present invention, since the projection-preventing locking portion is provided, when receiving an excessive transmission force from the motor, the shielding plate is excessively protruded, thereby damaging the floor surface, It does not cause a high frictional force to lower operability.

According to the eighth aspect of the present invention, since the shielding plate is made of an elastic material or a material having low frictional resistance, even if the shielding plate protrudes excessively when receiving an excessive transmission force from the motor, the floor surface is not affected. The operability is not reduced even if the surface is damaged or a high frictional force is generated.

According to the ninth aspect of the present invention, since the gear portion is provided between the motor and the shielding plate, the load can be reliably and irrespective of the rotation direction, the torque and the number of rotations of the motor. It is possible to store and project the shielding part without
High suction performance can always be obtained, and durability can be further improved.

According to the tenth aspect of the present invention,
Since the shielding plate is integrated with the suction tool, and the entire suction tool other than the wheels tilts forward or backward, the suction tool can be realized with a simple configuration.

[Brief description of the drawings]

FIG. 1 (a) is a side sectional view of a suction device of an electric vacuum cleaner according to a first embodiment of the present invention (when moving forward);

FIG. 2 is a schematic cross-sectional plan view of the suction tool.

FIG. 3A is a side sectional view of the suction device of the electric vacuum cleaner according to the second embodiment of the present invention (when moving forward). FIG. 3B is a side cross-sectional view of the suction device when moving backward.

FIG. 4 is a schematic cross-sectional plan view of the suction tool.

FIG. 5A is a side sectional view of the suction device of the electric vacuum cleaner according to the third embodiment of the present invention (when moving forward). FIG. 5B is a side cross-sectional view of the suction device when moving backward.

FIG. 6 is a schematic cross-sectional plan view of the suction tool.

FIG. 7A is a side sectional view of a suction device of an electric vacuum cleaner according to a fourth embodiment of the present invention (when moving forward). FIG. 7B is a side cross-sectional view of the suction device when moving backward.

FIG. 8 is a schematic cross-sectional plan view of the suction tool.

9A is a side sectional view of the suction device of the conventional vacuum cleaner (at the time of forward movement), and FIG. 9B is a side sectional view of the same suction device at the time of backward movement.

FIG. 10 is a schematic cross-sectional plan view of the suction tool.

FIG. 11 is an overall configuration diagram of a vacuum cleaner using the suction tool.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Suction tool main body 2 Suction port 3a, 3b Wheel 4 Connection pipe 5 Floor surface 6, 6a, 6b Shielding part 7 Rotating brush 8 Motor 16 Rotor 17 Stator 21 Clutch 22 Lever 23a, 23b Movable arm 24 Detection protrusion 25a, 25b Movable arm projection 26a, 26b Small projection 27a, 27b Large projection

Continuation of the front page (72) Inventor Hisao Tsunaga 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F term (reference) 3B057 DA09 3B061 AA51 AD05 AE02 AE14

Claims (10)

[Claims] A suction device provided with a suction port on a lower surface, a rotary brush rotatably disposed in the suction device, a motor for driving the rotary brush, and a front and rear portion of the suction port; A suction plate in which the suction port moves in the advancing direction and the rear side protrudes when the suction tool is moved in conjunction with the rotor of the motor; and a cleaner body that houses an electric blower that applies a suction force to the suction tool. Vacuum cleaner. 2. A suction device provided with a suction port on a lower surface, a rotary brush rotatably arranged in the suction device, a motor for driving the rotary brush, and a front and rear portion of the suction port. A suction plate in which the suction port moves in the movement direction side and is moved backward when the suction tool is moved in conjunction with the stator of the motor; and a cleaner main body that houses an electric blower that applies suction force to the suction tool. Vacuum cleaner. 3. The motor according to claim 1, wherein the rotary brush and the motor are provided at separate positions, and both are connected by a power transmission unit.
And the vacuum cleaner according to claim 2. 4. The vacuum cleaner according to claim 1, wherein a motor is provided inside the rotary brush. 5. The vacuum cleaner according to claim 1, further comprising a moving direction detecting section provided on a lower surface or inside of the suction tool. 6. The electric vacuum cleaner according to claim 1, further comprising a return prevention locking portion connected to the shielding plate. 7. The vacuum cleaner according to claim 1, further comprising an over-projection preventing locking portion connected to the shielding plate. 8. The vacuum cleaner according to claim 1, wherein the shielding plate is made of an elastic material, a low friction resistance material, or both. 9. The vacuum cleaner according to claim 1, wherein a gear portion is provided between the motor and the shielding plate. 10. The suction plate is integrated with the suction device, and the entire suction device other than the wheels is inclined forward or backward.
The vacuum cleaner according to claim 9.